// import { constantRoutes } from '@/router'
// import { getRouters } from '@/api/menu'
// import Layout from '@/layout/index'

// const permission = {
//   state: {
//     routes: [],
//     addRoutes: []
//   },
//   mutations: {
//     SET_ROUTES: (state, routes) => {
//       state.addRoutes = routes
//       state.routes = constantRoutes.concat(routes)
//     }
//   },
//   actions: {
//     // 生成路由
//     GenerateRoutes({ commit }) {
//       return new Promise(resolve => {
//         // 向后端请求路由数据
//         getRouters().then(res => {
//           const accessedRoutes = filterAsyncRouter(res.data)
//           accessedRoutes.push({ path: '*', redirect: '/404', hidden: true })
//           commit('SET_ROUTES', accessedRoutes)
//           resolve(accessedRoutes)
//         })
//       })
//     }
//   }
// }

// // 遍历后台传来的路由字符串，转换为组件对象
// function filterAsyncRouter(asyncRouterMap) {
//   return asyncRouterMap.filter(route => {
//     if (route.component) {
//       // Layout组件特殊处理
//       if (route.component === 'Layout') {
//         route.component = Layout
//       } else {
//         route.component = loadView(route.component)
//       }
//     }
//     if (route.children != null && route.children && route.children.length) {
//       route.children = filterAsyncRouter(route.children)
//     }
//     return true
//   })
// }

// export const loadView = (view) => { // 路由懒加载
//   return (resolve) => require([`@/views/${view}`], resolve)
// }

// export default permission

import { asyncRoutes, constantRoutes } from '@/router'

/**
 * Use meta.role to determine if the current user has permission
 * @param roles
 * @param route
 */
function hasPermission(roles, route) {
  if (route.meta && route.meta.roles) {
    return roles.some(role => route.meta.roles.includes(role))
  } else {
    return true
  }
}

/**
 * Filter asynchronous routing tables by recursion
 * @param routes asyncRoutes
 * @param roles
 */
export function filterAsyncRoutes(routes, roles) {
  const res = []

  routes.forEach(route => {
    const tmp = { ...route }
    if (hasPermission(roles, tmp)) {
      if (tmp.children) {
        tmp.children = filterAsyncRoutes(tmp.children, roles)
      }
      res.push(tmp)
    }
  })

  return res
}

const state = {
  routes: [],
  addRoutes: []
}

const mutations = {
  SET_ROUTES: (state, routes) => {
    state.addRoutes = routes
    state.routes = constantRoutes.concat(routes)
  }
}

const actions = {
  generateRoutes({ commit }, roles) {
    return new Promise(resolve => {
      let accessedRoutes
      if (roles.includes('admin')) {
        accessedRoutes = asyncRoutes || []
        console.log(asyncRoutes)
      } else {
        accessedRoutes = filterAsyncRoutes(asyncRoutes, roles)
      }
      commit('SET_ROUTES', accessedRoutes)
      resolve(accessedRoutes)
    })
  }
}

export default {
  namespaced: true,
  state,
  mutations,
  actions
}

